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Finding the Fourth Proportional to 112.80, 169.24 and 48.68

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Solution

The fourth proportional to 112.80, 169.24 and 48.68 is: 73.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.80 : 169.24 = 48.68 : x
  2. Step 2: Convert to fraction form
    112.80/169.24 = 48.68/x
  3. Step 3: Cross multiply
    112.80x = 169.24 × 48.68
  4. Step 4: Simplify right side
    112.80x = 8,238.60
  5. Step 5: Solve for x
    x = 8,238.60/112.80
  6. Step 6: Final answer
    x = 73.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.